We have pre-hypothesised primary and secondary outcomes in order to avoid bias through 'data-dredging' for significant results. We have tried to balance having sufficient breadth to reflect the potentially broad benefits of participation in the T&T programme, with the need to reduce the possibility of false-positive results arising from multiple tests of statistical significance. Full questions are available on request. All measures will be piloted within an independent sample of young people who will be then interviewed regarding their understanding of the meaning of the questions and the meaning of their responses. These outcomes will be measured at follow-up 2 (72 weeks) via pen and paper self-completion questionnaire surveys done under exam conditions in a classroom supervised by two researchers with no teachers present.